Here are some pictures of a CRT base I'm in the process of repairing. After removing the old base, I plan on attaching fine wires to the tips of the leads. Then, I'll thread them through the new base. I won't do that until I figure out the best glue to use though.

As for glue, we always used DOW RTV3145 - gray silicone that is quite firm when it cures, and will allow things to shift when the temps cause expansion and contraction. The Navy uses RTV3145 on their Heads-Up Display CRTs. Good enough for A-7 Corsairs and F/A-18 Hornets, good enough for mid-20th century consumer electronics use.

130 degrees Centigrade is way more than the neck would ever experience. That's beyond the boiling point of water. I've used an IR thermometer (with tungsten filter to reduce the effects of the filaments temp) on CRT necks and found the temps to be about 140 - 180 degrees 60-84 degrees Celcius (~140 - 180 degrees Fahrenheit). That's probably why the Military used RTV rubber - withstands up to 225 degrees Celcius.

The Navy uses RTV3145 on their Heads-Up Display CRTs. Good enough for A-7 Corsairs and F/A-18 Hornets, good enough for mid-20th century consumer electronics use.

But they also farm out EVERYTHING ot the lowest bidder. Anyone who's ever had the (dis)pleasure of working on the F/A=18E/F anti-skid braking system will tell you what a POS it is, so I'm not inclined to believe Military technology is necessarily the best out there after what I've seen. That said, I do like RTV for a job like this. I've personally had good luck with Wacky Glue, the base of the CRT in my Halolight is still stuck on prett hard.

Speaking of silicone, I've used Permatex Windshield Sealer for a varety of things. It doesn't give off that stinky acidic smell but it is quite flowable so do allow it time to cure. It's also clear. I've used it on flybacks with good results.

It will harden up better than regular RTV, kinda' like a hot glue stick does when dry. You can pour some out on a piece of paper or whatever, let it cure overnight and see if you like the results before using it on your socket.